Combined type-writing and computing machine.



H. HANSON. COMBINED TYPE WRITING AND COMPUTING MACHINE APPLICATION FILEDFEB. 12, I9I2- Patented Sept. 24, 1918,

3 SHEETS-SHEET I.

iQ ENVENTOR Wawd'v MMM BY ATTORNEY H. HANSON COMBINED TYPE WRITING ANDCOMPUTING MAGHINE.

APPLICATION FILED FEB. 12. 1912.

1 ,279,687. Pafented Sept. 24, 1918.

3 SHEETS-SHEET 2.

WITN ESS ES: 3 IN VEN T0 R: #fi III// ATTORNEZ y'cw zw a H. HANSONCOMBINED TYPE WRITING AND COMPUTiNG MACHINE.

APPLICATION HLEDJ EB- I2. 1912. 1,279,687. PatentedSept. 24, 19185.

3 SHEETSSHEET 3.

WITNESSES:

INVENTOR:

MM BY ATTORN Y Kill rrnn STATES PATENT OFFICE.

HANS HANSON, ()F HARTFORD, CONNECT ICU'I, ASSIGNOR, Br MESNEnssrenmsnrs,

To ortntinwoon oomrornve MACHINE COMPANY, on NEW some, it". Y,, it comesRATIGN' OF NEW YORK.

GGMBINED TYPE-WRITIl TG AND -COMPUTIN G MACHINE.

inmost.

Specification of Letters Eat'ent.

Patented Sept..24, 1918..

Application filed February 12, 1312. Serisi No. 674?,052.

To all whom it may concern:

Be it known that I, HA s HANSON, a citizen of the United States,residing in Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inCombined Type- Writing and (lomputin Machines, of which the following isa speci cation.

This invention relates to computing ma chines of the kind in which pinsor devices are set by means of numeral keys and are then caused tocooperate with dial wheels to determine the extent of rotation of thelatter.

One of the principal objects of the invention is to enable a single setof such key-set pins or devices to cooperate with any of a. series ofsets of dial wheels.

The invention is illustrated in connection with s combined typewritingand computing machine oi. the Unclerwoodl-lansoii type, in which thekey-set pins are carried upon rack bars, these rack hers having teethwhich mesh with pinions to turn the diahwheels. In carrying out myimprovements, 1' substitutc for the dial wheels a set of master Wheels,and Ii wheels upon a carriage; so that by moving the carriage, anydesired set of dial wheels can. he brought into conjunction with thesingle master set, .The paper-carriage of the type-writing machine isprovided with a series of dogs, one for each of the sets of dial wheels,and these dogs, one after another, operate the denomination deviceswhich select the pin bars or racks which-are to cooperatewith the keys.Hence during a single run of the paper carriage all of the dial wheelsets can be operated one after another by the same set of master wheels.

Other objects and advantages will hcreinafter appear. v

In the accompanying drawings,

Figure 1 is a sectional side elevation of a combined typewriting andcomputing machine embodying the present improvements.

Fig. 2 is a plan of the dogs on the paper carriage of the typewriter andthe denomination jacks opc'nted thereby.

Fig. 3 is a sectional elevation similar to a. portion of Fig i but on a.lei-o'er scale.

Fig. 1 is a similar to Fig. 3, hot showarrange e'series of sets of dialing one of the sets of dial wheels meshing with the set of masterwheels.

Fig. 4c? is a. plan of one train of dial wheel, master wheel and tenscarrying mechanism, the parts in'normel positions.

' Fig. 4: is a detsil section showing the onewey clutch connectionwhereby the carryover assistingsheft is driven solely during the returnmovei'nent of the general operator.

Fig. 5 illustrates the normalposition of the feeding dog of the carriagewhich carries the dial wheels; and Fig. 6 illustrates the so normalposition thereof.

'Fig. 7 is a general plan of the computing mechanism in the base of themachine.

Numeral keys 1 of the'typew'riter depress levers 2 to vibrate bellcranks 3,- to swing type bars up to print against a platen 5, which ismounted on a carriagedv The latter is driven by a spring-barrel 7, andhas a rock 8 meshing with a pinion 9, connected to escapement wheel 10,which is controlled by dogs 11; said dogs operated by a universal. bar12, which is driven by heels 13 on the type bars. v

Said lreys 1 have stems it to depress arms 15 on rock shafts lid,"forming ports of linkages 17, which. are epresscd by said keys to soengage and depress computing pins 18, the latter suitably mounted onbars 19. These bars 19 are elevated one at a time, throughthe.instrnmentolity of one of the dogs on. the carriage 6,. said dogengaging jacks 2?. one after another, to depress links and ii bratelevers 23, which engage linkages to raise the rear ends of said bars 19seriatdm. As stated above, there is one of the dogs 20 for each columnin which computing is done. After the .lzeys l have been. depressed toprint the desired number on. the work sheet, the operative pullsforwardly a handle 95, which is provided upon s. rock shait 26; theletter extending across the machine and having at itsends segments 27,which mesh with idle pinions 28, meshing with o osite racks which formparts of the tor: said racks connected l The forward movement oi scarries the cross-bar 30 engages so been depressor by l word the bare itsee handle 25 id drives forsaid hers haw a time to the master set ofcomputing wheels. The dial wheels have ten peripheral teeth 38, whichmay mesh with the teeth of the master wheels 34; and upon the severalteeth 38 are provided numerals to be read for the LEiifll purpose. Thecarriage may be a box-like structure, as illustrated, and may have afront roll 39 to run on a rail 10 and rear rolls 41 to run on a rail 42.

The rail 42 may be rounded, and the rolls 41 may be made concave so thatthere may be a pivotal or hinge action, to permit the carriage to rockfrom the Fig. 3 position, in which the dial wheels 36 are out of mesh,to the Fig. 4' position, in which one of the sets of dial wheels is inmesh with the master set 34:. By this means, any rotation of the masterwheels 34?, which is effected by the racks 32, is transmitted to thedial wheels 36 which are in mesh therewith, the dial wheels of the othersets not being affected,

The keys 1 having been operated to print the numerals upon the worksheet, and the carriage 37 having been adjusted along its tracks tobring a set of dial wheels opposite the master set 34, the generaloperator handle 25 is pulled, and the carriage 37 is swung to bring thedial wheels into mesh with the master wheels before the latter begin toturn; there being-some lost motion of the general operator 2f) beforethe pinoperating bar 30 engages the first depressed pin 18. Thisbackward swinging or shifting movement of the carriage 37 is effected bya lever 43, pivoted at 44 upon the framework and carrying at its forwardend a roll 45, which bears down upon a bar or plate 46 upon thecarriage, to depress the rear portion thereof and swing the dial wheelshack- \\'ardly.- The lever is operated by means of a cam disk 4.7 whichrotates in opposite directions during the forward and backward movementsof the.general operator, being i'or purpose provided with a gear 48,which is connected by an idle gear 49 to one of the racks 29 of thegeneral operator.

The cam disk has in its edge a depression 50 in which norn'ially rests aroll 51 provided upon the rear end of said carriage :nvinging memberDuring the forward stroke of the general operator, the roll 51 is forcedout of the notch, thus vibrating the lever to swing back the dial wheelcarriage, During the remainder of the stroke of the disk 47, said roll51 rides upon its periphery, thus holding the carriage 37 with theselected set of dial wheels in mesh with the master wheel 34:. The disk47 need not make quite a full revolution, and the roll 51 need not,therefore, drop into the notch 50 at the completion of said forwardstroke of the general operator, but may remain upon the circularperiphery of the disk 47 until the latter returns to normal position,thus holding the dial wheel set in mesh withthe master set during thetens-carrying operation which occurs during the return stroke of thegeneral operator.

It will be understood that at the completion of the return stroke of thegeneral operator and of the disk 47, the roll 51 will drop again intothe notch 50, thus permitting the carriage 37 to swing by gravity to itsforward or normal position.

Upon each of the' dial wheels 36 is provided a starting tooth 52,forming part of a tens-carrying or carry-over mechanism; andWvhen thedial wheels are in the F ig'. 4 position, any starting tooth 52 mayeffect aii operation gt a tens-carrying train, 2 the principal membersof which comprise a nine-toothed pinion and a three-toothed pinion 54fixed to pinion 53. The tooth 52 operatesthe pinion'53 by means of anintervening idle pinion 55. These idle pinions are mounted loosely uponafixed arbor 56; and the pairs of pinions 53, 54; are mounted looselyupon a fixed arbor 57. The threetoothed pinio 54 is in position tooperate the master wheel 34. of next higher denomination, but isnormally out of mesh therewith, as will be understood at Fig. 3. Thestarting tooth turns the double pinion 53, 54 in the direction of thearrow from the Fig. 3 position to the Fig. 4, position, and thus bringsthe pinion 53 into position to be engaged by its associated driving spur58, which operates during the return stroke of the general operator 29.Every third tooth on the pinion 53 is cut away, as at 59, to make aclearance for the associated spur 58, so that the spur cannot turn thetens carrying train unless the latter has been first started by thetooth 52.

Thus it will be seen that the dial wheels 36 are provided with teeth 52for'starting their respective tens-carrying trains; each tooth 52, oncein each revolution of its wheel, engaging one of the teeth on the pinion55, for this purpose. This is done while the dial wheel 36 is movingfrom 9 to 0, the pinion 53 turning one-ninth of a revolution from theFig. 3 position to the Fig. 4 position; while the operation of thetenscarrying train is completed, during the return stroke of the generaloperator, by onel spur 58 of a set which is fixed upon a trans verseshaft 60, which is driven from the rack 29 through idle gear 49, an idlepinion during the return stroke ofthe pinion, but

respect thereto; but when a train is started from the Fig. 3 position tothe Fig. 4 position, enact-the uncut teeth of thepinion 53 moves'intothe path of its spur 58, and the latter therefore, at the ensuingrotation of the shaft 60, drives the tens-carrying train and advancesthe next higher master wheel 34 and hence the dial 36 with which thelatter meshes, the shaft 60 thereafter completing its revolution tonormal position, being held in normal position by a spring detent, notshown herein but disclosed in United States Patent No. 816,319, grantedto me March 27, 1906', and in the pending application of F. A. Hart, No.466,836, filed DecemberS, 1910.

It will be'noticed that the pinion 33, in each instance, is connected toits computation wheel 34 by means of a ratchet 68 and a pawl 69, topermit the computation wheel to'be adyanced by the tens-carrying trainindependently of its rack 32,

The master wheels andthe dial wheels are all driven by both the racks 32and the spurs 58, while the carriage 37 is in its Fig. 4 position; andat the conclusion of such operation, the carriage may return to itsnormalFig. 3 position, thus disconnecting the dial wheels from themaster wheels. The latter may have spring detents 70, and each set ofdialwheels may have a single detent bar 71 pivoted at 72 to the carriageand pressed by a spring 73 into engagement with all of the dial wheelsin the set. When the carriage is being swungback from Fig. 3 to Fig. 4,an arm 74 on said detent bar is intercepted by a trip 75, and all thedial Wheels in the set move out of engagement with said bar detent 71 asthey move into mesh with the master wheel 34; there being preferably nopoint in which control of the dial wheels is lost.

The feeding movement of the dial wheel I carriage 37 is effected by aspring-76 which is connected.by a cord 77 to apia, 78 the carriage 37,and tends alwaysto drawthe carriage to the left at Fig. 7. Upon thecarriage is a rack comprising a series of teeth 79, one foreachcomputing head 36, of which there may be as many as desired upon saidcarriage; the lattermay of course be of any desired length, in order toaccommodate any required number of computing heads.

A dog 80 is normally in engagement the teeth of rack 7 9 and restrainsthe same against being propelled by said spring 76. When, however, thecarriage is swung the Fig. 4 position, the rack is swung down. ofengagement with said pawl or dog 86 into engagement with a fired or 81,so that the latter temporarily resti the carriage from travelingr Whiierecur 7 9 is so depressed, a spring 82. snaps the dog 80, which ispivoted at 83 upon the framework, from a normal pom'tion at Fig. 5 pastthe-tooth 79 from which it has just escaped. The position at Fig. 6corresponds with t! at Fig. 4. Upon the return of ti e carria e 37 tonormal forward position, 3, rack 79 escapes from the detent 8i and risesto permit its succeedingtooth 73 to engage the feeding dog 80, as atFigs, 3 and 5; carriage 37 of course making a jump equal to the distancebetween the teeth 79, which isequal to the spacing of the dial wheelheads 36 at Fig. 7. After a line of writing is completed and the papercarriage 6 cl? the typewriter has been returnedto begin a new line ofwriting, the carriage 37' may we be returned by hand to bring the firstor any desired adding head thereon. into positidn for coiiperating withthe master wheel set- 34.

Variations may be resorted to within the L scope of the invention, andportions oi the improvements may be used without others.

Having thus described my invention, l claim:

1. Ina computing machine, the combination with a series of actuatingracks, oi a master set of wheels driven thereby in one direction, aplurality of sets of dial wheels, said dial sets adjustable in onedirection to bring any selected set of dial wheels to lmaster set, andalso movable in another direction to bring the selected set of dialwheels into mesh with said master set to be driven thereby, andcarry-over gears mesh ing with said master set of wheels.

2. The combination of a single master set of computing members, meansfor operating them concurrently including a general oper ator, acarriage, a series of sets of dial wheels on said carriage, saidcarriage sets operator for feeding the carriage to bring the setssuccessively/into position for cooperation with said master set.

3. In a computing machine, the combination with a series of actuatingracks, of a master set of wheels driven thereby, a plurality of sets ofdial wheels, any set of which may be controlled by said master set ofwheels, a general operator, means controlled thereby for driving saidmaster set of wheels and the cooperating set of dial wheels on onestroke of said general operator, carrying mechanism, means forinitiating a carrying-operation by the wheels of any active set of dialwheels, and means for completing the carrying-over operation on theactive set of dial wheels on the return stroke of the general operator.

4. The combination of a master set of computing wheels, means foroperating them concurrently, including a general operator, a carriage, aseries of sets of dial wheels on said carriage, said carriage setsengageable one at a time with said master set to be operated thereby,means connected to said general operator for feeding the carriage tobring the sets successively into position for cooperation with saidmaster set; said series of sets being mounted on said carriage out ofposition for meshing with said master set, and means also dependent uponsaid general operator for moving said carriage sets into mesh with saidmaster set.

5. The combination with a master set of computing members, of means foroperating them'concurrently, a carriage, a pair of separate tracks onwhich said carriage normally runs, and a series of sets of wheelsmounted on said carriage out of mesh with said master set of members,said carriage being tiltable or shittable about one of said tracks as afulcrum and away from the Other track to bring any of its sets into meshwith said master set to be operated thereby.

6. The combination with a master set of computing devices, of means foroperating them concurrently, a carriage, a series of sets of computingwheels mounted on said carriage out of mesh with said master devices,said carriage being tiltable or shiftable to bring any of its sets intomesh with said master set to be operated thereby, and means for feedingthe carriage; said operating means including a general operator, andmeans controlled by said general operator for shifting said carriage tobring any of its sets into mesh with said master set.

7. The combination with a master set of computing wheels, of means foroperating them concurrently including a general operator, a carriage, aseries of sets of dial wheels mounted on said carriage out of mesh withsaid master set of wheels, said carriage being tiltable or shiftable bysaid general operator to bring any of its sets into mesh with saidmaster set to be operated thereby, and

an escapement mechanism including a part on the framework and a secondpart on the carriage to shift with the latter relatively to the firstpart at the operation of the general operator.

8. The combination with a master set of computing members, of meansincluding a general operator for operating said members concurrently, acarriage, two tracks on which the carriage normally runs, aseries ofsets of computing wheels mounted on said carriage and normally out ofmesh with said master set of members, a rotary cam connected to saidgeneral operator, and means controlled by said cam for tilting orshifting said carriage about one of its tracks as a fulcrum, to bring aset of wheels thereon into mesh with said master set.

9. The combination with a master set of computing members, of meansincluding a general operator for operating said members concurrently, acarriage, a series of sets of computing wheels mounted on said carriageand normally ut of mesh with said master set of members, meanscontrolled by said general operator for shifting said carriage to bringa set of wheels thereon into mesh with said master set, a driving springfor said carriage, and an escapement mechanism including cooperatingparts, one of which is mounted on said carriage to be efiectivelyoperated thereby at the wheel-shifting movement of the latter.

10. The combination of a master set of computing wheels, a generaloperator for operating said wheels concurrently, a carriage, a series ofsets of computing wheels on said carriage, said carriage sets engageablcone at a time with said master set to be operated thereby, and-a set oftens-carrying or transfer trains dependent upon. the carriage wheels butmounted upon the framework of the machine to cooperate with saidcarriage sets through said master set one after another.

11. The combination of a master set of computing wheels, a generaloperator for operating said wheels concurrently, a carriage, a series ofsets of computing wheels on said carriage, said carriage sets engageableone at a time with said master set to be operated thereby, a set oftons-carrying or transfer trains dependent upon the carriage wheels butmounted upon the framework of the machine to cooperate with saidcarriage sets one after another through said master set; said carriagesets being normally out of position for cooperating with said master setand said tens-carrying trains, and means for moving said carriage setsinto engagement with said master set and said tenscarrying trains.

12. The combination of a master set of computing Wheels, a master set oftens-oarrying or transfer trains operating through said master set ofcomputing Wheels, a gen-- eral operator for said sets, a carriage, and aseries of sets of computing Wheels on. said "carriage, said carriagesets engageable one at a time With both of said master sets to beoperated concomitantly thereby; the Wheels on said carriage havingdevices to inltiate the tenscarrying operations. 1 13. The combinationof a rel atively stationprising a pinion, each Wheel in each of saidcarriage sets having a tooth for starting said pinion, and each of saidtens-carrying tra ns also comprising a second pinion in mesh onto thefirst and having a third pinion to engage the computing Wheel of nexthigher order in said master set; said general operator including meansfor engaging said tenscarrying trains .to drive the same.

14. In a combined typewriting and conr puting machine, the combinationwith a letter-feeding carriage, of a master set of computing Wheels,several complete sets of readable dial Wheels all normally out ofengagement with said master set, said sets adjustable in one directionindependently of said letter-feeding carriage, to bring any selected setof dial Wheels to said master set, and also movable in another directionto bring the selected set of dial Wheels into mesh or cc iperation withsaid master set, and means, including a set of numeral keys anddenominationseleoting devices, to coiiperate with said letterdeedingcarriage for controlling the operation of said master set upon said dialsets successively, during a single run of the letter-feeding carriage.

15 The combination With a master set of computing Wheels, of a carriage,sets of readable dial Wheels upon said carriage, said dial Wheelsnormally out of engagement with said master set, said carriage movableone direction to any selected set of dial Wheels to said master set, andmovable in. another direction to bring the selected set of dial Wheelsinto mesh or eoiiperation with said master set, a letter-feedingcarriage, and means to cooperate therewith for controlling the operationof said master set once for each of said sets dial Wheels during asingle run oi. said letter-feeding carriage.

16. The combination master set of computing devices, means for operatingthem concurrently, a carriage, a series of sets of computing Wheels onsaid carriage, said carriage sets engageable one at a time with saidmaster set to be operated thereby, devices for feeding the carriage tobring the sets successively into position for cotiperation with. saidmaster set;said series of sets being mounted on said carriage-out ofposition for meshing with said master set; and means for moving saidcarriage sets into and out of mesh with said master set andconcomitantly effecting an operation or said feeding devices.

17. The combination of a master set of computing devices, a generaloperator having' means for operating them concurrently, a carriage, aseries of sets of computing Wheels on said carriage, said carriage setsengageable one at a time with said master set to be operated thereby,means controlled by said general operator for feeding the can riage tobring the sets successively into position for cooperation with saidmaster set; said series of sets being mounted on said car riage out of,positioni'or meshing With said master set; and means connected. to saidgeneral operator for moving any of said can riage sets into mesh Withsaid master set and holding it there.

18.. lhe combination with a master set of computing members, of meansfor operating them concurrently, a carriage, a hingarail or tracktherefor, a series of sets of computing Wheels mounted on said carriageout of mesh with said master members, said carriage being tiltable onsaid track to bring any of its sets into mesh with said master set to beoperated thereby, means to tilt the can riagc, and means connected tosaid tilting means for feeding the carriag.

19, The combination of a relatively stationary master set of computingWheels, a general operator for operating said Wheels concurrently, acarriage, a series of sets of computing Wheels on said, carriage, saidcarriage sets engagcable one at a time with said master set to'beoperated thereby, a relatively stationary set of tens-carrying ortransfer trains to engage and drive Wheels in said. master set andmounted upon the framework of the machine to coiiperate with saidcarriage sets one after another; said carriage sets having means forinitiating the tens-carrying operations and being normally out ofposition for cooperating with said master set and said tens-carryingtrains,

means for moving said carriage sets into engagement with said master setto be driven thereby and also with said tens-carrying trains, to imtiatethe movements oi: the latter; said general operator having means todrive the tens-carrying trains that have been started by the Wheels inany carriage set, each-tens-carrying train comprising a partly mutilatedpower-driven pinion, a second pintill its

lid

ion to engage the master wheel of next higher denomination, and a thirdpinion in mesh with the first and in position to be engaged by thestarting teeth of the momentarily associated carriage computing wheel.

20. The combination with a relatively -sta'- tionary master set ofmembers, of a carriage,

. wheels on said carriage operable by said master set, but normally outoflengagement therewith, a feeding mechanism for said carriage acting tobring said carriage wheels into position for cooperation with saidmaster set, and shifting or tilting means for said carriage acting bothto operate the feeding mechanism and to bring the carriage wheels intoactual engagement with said master set of members.

21. In a computing machine, the combination with a series of actuatingracks, of a master set of wheels driven thereby in one direction, aplurality of sets of dial Wheels, said dial sets adjustable in onedirection to bring any selected set of dial wheels to said master set,and also movable in another direction to bring the selected set of dialwheels into mesh with said master set to be driven thereby, andcarry-over devices associated with said master set of Wheels andoperating the dial wheels through said master set.

22. The combination with a plurality of sets of computing wheels, of acomputing mechanism for determining the extent of rotation of saidcomputing wheels, actuating mechanism for said sets, means for effectinga relative movement between said sets and said actuating mechanism tobring about individual juxtaposition between each of said sets and saidactuating mechanism, shifting means for affording relative to-andfrommovement between each set and said actuating mechanism, to bring aboutan actual cooperation, so that said actuating mechanism can rotate thecomputing wheels of the set in juxtaposition thereto, and means toenable one of said relative movements to control the other of saidrelative movements.

23. The combination with sets of computing wheels, of actuating mechanism for said sets, a general operator for said actuating mechanism,means for effecting a relative movement between said sets and saidactuating mechanism, to bring about individual juxtaposition betweeneach of said sets and said actruiting mechanism, shitting means foraffording relative to-andfrom movement between each set and saidactuating mechanism, to bring about an actual cooperation, so that saidactuating mechanism can rotate the computing wheels of the set injuxtaposition thereto, means to enable onrrof said relative movements tocontrol the other of said relative movements,

and controlling means actuated from said a plurality of general operatorfor governing both of said relative movements.

:24. The combination with a set of computing wheels, of a travelingcarriage for said set, a rail and roller support for said carriage, andactuating mechanism for said set, said carriage being travel-sable alongsaid rail to bring said set into the sphere of pperation of saidactuating mechanism, and also being pivotal about said rail to bringsaid set into actual cooperation with said actuating mechanism.

25. In a combined typewritirg and computing machine, the combinationwith numeral keys, of a series of computing heads for computing invarious columns, a single set of devices in which numbers aretemporarily set up before being carried into said heads, a generaloperator for actuating said devices to carry the set up numbers into ahead, and means operated by said general operator for bringing thenexthead to effective position with reference to said devices when thenumber has been completely carried into one head.

26. In a combined typewriting and computing machine, the combinationwith numeral keys, of a series of computing heads for computing invarious columns, each computinghead including a series of computingwheels, a single set of devices in which numbers are temporarily set upbefore being carried into said heads, a general operator for actuatingsaid devices to carry the set up numbers into a head, means operated bysaid general operator for bringing the next head to eiiective positionwith reference to said devices when the number has been completelycarried into one head, actuating devices driven by the first-nan1cddevices and arranged in turn to drive said. computing wheels to anextent determined by the numbers set up, and carry-over de viceseffective on said head through said actuating devices.

27. In a combined typewriting and computing machine, the combinationwith numeral keys, of a computing carriage con1- prising a series ofcomputing heads, a single mast 1' head computing heads, each of saidheads comprising a set of computin wheels, lo kin means normally holdingt e wheels locked in each head, a' general operator for carrying numbersthrough said master head into the computing head which is effective atthe moment, means moved by said general operator for first freeing saideffective computing head from itsloclring means and then bringing itsWheels into mesh with the nmster head, and carry-over devices effectiveon the said computing head through the master head,

28; In a combined typewriting and co for actuating any one of said jmaster head for eetue'eing any one of eeid.

computing heads, eeeh of said hees cemjprising a set ef eompueing wheelsleaking means normally holding the WhGGiS leaked in each head, a generaloperate]: fer carryiieg numbers threugh said master need inee theeemputing head. which is efieetive at the m0n1eiit,'-n1eene moved. bysaid general 0; eretoz" for first freeing said efi'ective com" putinghead from its locking means and ehen bringing its Wheels into mesh withthe master heeci, eai'ryevei' devices effective en the said computinghead through the master heed, and means epereteci by said generalepereter w bring the next heed inte efi'ee tive position at the end (ifeeeh eperaeion.

29. In e eempueing inwii iiie the combine Lion with a die} Wheel, of enactuating Wheel,

eherei eig said dial Wheel having carry-over mechanism eolinprising edriving whee ef festive en the actuating Wheel, normeiiy i1ieffectivemeans by which said driving Wheei wfii'o'n with 21 die} Wheel, of enactuating Wil therezfer with Which it is normally ee'i', mesh, said dialWheel hevinge carry-eve? teeth, carryover mechanism comprising drivingWheel efl'eetive 0n the eeue'z' Wheel normally inefifeezive meens W1: wesaid driving Wheei may be driven, and

Wheel normally in ineffective pesiisiee but effective when the actuatingWheel is efee 3 eive on the dial Wheel, and constantly in mesh with saiddriving wheel and edep eel "be moved by said carr ever tooth to move thedriving wheel to effective pesieion where Will be driven.

HANS HAJEQCQL Vfitnesses FRANK A. 000K, VJ. M. BYORKMAN.

